| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Titanium Technology
|
| Presentation Title |
Exploring Sub-stoichiometric Titanium Hydride Phase Space via Vacuum Hydrogen Annealing, X-ray Diffraction, and Combined Thermogravimetric Analysis/Mass Spectroscopy |
| Author(s) |
Chad Richard Macziewski, Daniel Charles Bufford |
| On-Site Speaker (Planned) |
Chad Richard Macziewski |
| Abstract Scope |
Titanium hydrides with formula TiHx exist over a range of compositions with 0 < x ≤ 2 (0 to 4 wt% hydrogen). Many applications focus on hydrogen as a processing aide or exploiting hydrogen content of near-stoichiometric hydrides (x ≈ 2). The intermediate range has been characterized to find pressure-composition-temperature relationships and is traversed frequently during hydride/dehydride processing of titanium sponge into powder. However, materials with intermediate hydrogen stoichiometry and techniques to quantify hydrogen in this region have seen less investigation. Here we produced sub-stoichiometric hydrides with 1.5 < x ≤ 2 from multiple feedstocks by manipulating processing temperature, pressure, and time utilizing multiple paths to sub-stoichiometric hydrides, including dehydriding TiH2 and hydriding Ti powders. X-ray diffraction and thermogravimetry coupled with quantitative mass spectrometry offer a means to quantify hydrogen content. Parallel development of these processing methods alongside analysis techniques reestablishes what accuracies are obtainable when processing sub-stoichiometric titanium powders. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Powder Materials, Titanium, Extraction and Processing |